Power supply



FIG. 1 is a perspective view of a first embodiment of a power supply showing our new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a third perspective view thereof;

FIG. 4 is a fourth perspective view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front elevational view thereof;

FIG. 8 is a rear elevational view thereof;

FIG. 9 is a left side elevational view thereof; and

FIG. 10 is a right side elevational view thereof.

FIG. 11 is a perspective view of a second embodiment of a power supply showing our new design;

FIG. 12 is a second perspective view thereof;

FIG. 13 is a third perspective view thereof;

FIG. 14 is a fourth perspective view thereof;

FIG. 15 is a top plan view thereof;

FIG. 16 is a bottom plan view thereof;

FIG. 17 is a front elevational view thereof;

FIG. 18 is a rear elevational view thereof;

FIG. 19 is a left side elevational view thereof; and

FIG. 20 is a right side elevational view thereof.

FIG. 21 is a perspective view of a third embodiment of a power supply showing our new design;

FIG. 22 is a second perspective view thereof;

FIG. 23 is a third perspective view thereof;

FIG. 24 is a fourth perspective view thereof;

FIG. 25 is a top plan view thereof;

FIG. 26 is a bottom plan view thereof;

FIG. 27 is a front elevational view thereof;

FIG. 28 is a rear elevational view thereof;

FIG. 29 is a left side elevational view thereof; and,

FIG. 30 is a right side elevational view thereof.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a power supply, as shown and described. 